Puffing his beard and open mouth grunting?

[Terra213]

It's been 3 hours since I fed him so I dont think he's choking. He had his beard fully puffed and his mouth open making a low grunt. Went on for 10 minutes roughly. He's looking a little more comfortable but his beard is still puffed and it had me worried. I've never seen him do anything like that before so I'm not sure if its a bad sign or if maybe it was some territorial behavior he hasn't shown before

 

[AHBD]

How is he doing today, still having the strange breathing problem ? If so, can you post a video ? If he continues it sounds like a trip to the vet would be a good idea, only an experienced vet though.